Improvement in caps for plane-irons



G. N. TUTTLB. GAP FOR'BLANE IRON.

10.108,946. .Y Patented Nomi, 1870.

mi film 'v///////// igggyg: A gmini Letters Patent No. 108,946, dated Noveiiir 1, 1870.

IMPROVEMEN'I IN'CAPS FOR PLANE-IRONS.

The Schedule referred to in these Letters Patent `and making part of the samel I, CHARLES N. TUTTLE, of Auburn, Cayuga county, New York, have-invented certain new and useful Improvements in Caps for Plane-Irons, of which the following is a specification.

Heretofore, in the manufacture of steelcapsfor plane-irons, it has been usual to form the raised hub that enters the elongatedslut of the cutter-iron, and that receives the eontining and adjusting-screw, from the body of the cap itself,by swaging up suoli hub; but this is quite an expensive process, and necessitates the heating to a greater degree, and for a longer time,

of the cap.

My object is tocheapen the construction oi me cap and manufacture it by a simpler process; and

My'invention consists Vin a cap havinga metallic hnbhsecured thereto by brazing, and which is afterward provided -with a screw-thread, and th'us forms an im.- proved cap` In the accompanying drawing- Figure 1 represents, in perspective, my improved cap;

Figure 2, a top view;

Figure 3, longitudinal central section and Figure 4, a longitudinal central section of a modified i'orm.

A represents the cap of a double plane-iron, which is to be formed of steel; but, instead of swaging np a hub on the surface of the cap, I am enabled to do entirely away with such action by simply cutting oc from a strip of smooth iron of proper width and thickness a length suitable for a hub, B, and this I secure to the surface of the cap, which I am enabled to make from the regular rolled steel or iron, by moans of brazing.

' It will be evident to those skilled in the manufacture of these articles that it i's a great desideratum to be able to use the regularrolled steel or iron, and have simply to cut itoff the proper length, turn the corners, androuud up and sharpen the lower edge, thus obviating the heating and working of but one end.

The cap and hub are provided with a hole either after or before brazing the hub to the cap, which is provided with a thread to receive a confining and adjusting-nut, C', which I prefer to make of malleable iron on account of cheapness and durability.

Instead of brazing the hub directly to the surface of the cap, I may punch a hole of suitable size through the cap, andin this hole place a hub of a thickness necessary to fill up such opening, and also project the proper distance above the cap to form a huh, as in tig. 4, and this hub I braze in or to the opening in the cap.

In all cases where a hub is formed or secured to the cap by swagiug, the hub has afterward to be dressed square on the sides; but with a hub previonslysquared in its manufacture, and then bra-Zed, this tedious and rather expensive portion ofthe manufact-nre is avoided.

Having described my invention,

I claimy The plane-iron cap, provided with a. unt when each is formed in separate pieces, and brazed together, as and for the purpose herein specified.

` C. N. TUTTLE.

Witnesses:

G. W. Urna'n, C. N. Turnus, Jr.

aunt ditta, 

